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  • Biological & physiological aspects of action of insulin-like growth factor peptide family
  • Pavelic J; Matijevic T; Knezevic J
  • Indian J Med Res 2007[Apr]; 125 (4): 511-22
  • The insulin-like growth factor (IGF) is a complex system of peptide hormones (insulin-like growth factors of type 1 and 2, IGF-1 and IGF-2), cell surface receptors (insulin receptor, IR; insulin-like growth factor receptors of type 1 and 2, IGF-R1, IGF-R2) and circulating binding proteins (insulinlike growth factor binding proteins, IGF-BP 1-6). IGF-1 and -2 are mitogens that play a role in regulating cell proliferation, differentiation and apoptosis. Their effects are mediated through the IGF-R1 which initiates signaling cascades that result in regulation of a number of biological responses. IGF-R2, together with IGF-BPs is involved in binding, internalization and degradation of IGF-2. IGF proteins regulate cell proliferation in an interconnected action via autocrine, paracrine and endocrine regulatory mechanisms. Consequently, any perturbation in each level of the IGF signaling proteins has been shown to be implicated in development and progression of numerous cancer types. The most important single components in this processes are IGF ligands as well as IGF-R1 - when disturbed they act as oncogenes. It has been shown that: (i) high serum concentrations of IGF-1 and IGF-2 are associated with an increased risk of breast, prostate, colorectal and lung cancers; and (ii) IGF-R1 is commonly disturbed in many tumours (like gastric, lung, endometrial cancer) leading to a phenotype of anchorage-independent tumour growth. In contrast, IGF-R2 is considered to act as a tumour suppressor gene; it protects the cells from neoplastic impulses. Consistent with the IGFs autocrine/paracrine regulation of tumour growth, cancer treatment strategies interfering with IGF-R1 signaling have been developed, that may be useful in future diagnostic and therapeutic strategies.
  • |Animals[MESH]
  • |Growth Hormone/metabolism[MESH]
  • |Humans[MESH]
  • |Insulin-Like Growth Factor Binding Proteins/genetics/metabolism[MESH]
  • |Insulin/genetics/metabolism[MESH]
  • |Neoplasms/metabolism[MESH]
  • |Receptors, Somatomedin/genetics/*metabolism[MESH]
  • |Signal Transduction/physiology[MESH]
  • |Somatomedins/genetics/*metabolism[MESH]





  • *{{pmid17598937}}
    *<b>[http://www.kidney.de/mlpefetch.php?search=17598937 Biological & physiological aspects of action of insulin-like growth factor peptide family ]</b> Indian J Med Res 2007; 125(4) ; 511-22 Pavelic J; Matijevic T; Knezevic J

        *17598937*

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    Indian J Med Res

    511 4.125 2007